hookie duke means: A sudden maneuver you make while riding and lead a few others behind can result in a bike dog pile or drop from your group. You can make a sudden left-or right turn or a U-turn or take the path that is less frequently traveled, especially if you have skinny tires. Although it may seem unnecessary, a change of route is necessary to increase the enjoyment of riding or to prevent dangers. (in Community Dictionary, added by Aliya Suarez)